//=============================================================================
//     _   _                               ____                _  _          
//    | | | |  __ _  _ __   _ __   _   _  / ___|  _ __   _ __ (_)| |_   ___ 
//    | |_| | / _` || '_ \ | '_ \ | | | | \___ \ | '_ \ | '__|| || __| / _ \
//    |  _  || (_| || |_) || |_) || |_| |  ___) || |_) || |   | || |_ |  __/
//    |_| |_| \__,_|| .__/ | .__/  \__, | |____/ | .__/ |_|   |_| \__| \___|
//                  |_|    |_|     |___/         |_|                         
//
//                     HappySprite - We make sprites happy
//
// Copyright (c) 2007 by Tank Monkey Games
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//=============================================================================

using System;
using System.Collections.Generic;
using System.Text;
using Microsoft.Xna.Framework;

namespace HappySprite.SceneGraph
{
    public class OrthographicCamera : Camera
    {
        Vector2 size;

        public OrthographicCamera()
        {
            SetViewportBounds(0f, 0f, 640f, 480f);
        }

        public Vector2 Size
        {
            get { return size; }
            set { size = value; }
        }

        public float Height
        {
            get { return size.Y; }
            set { size.Y = value; }
        }

        public float Width
        {
            get { return size.X; }
            set { size.X = value; }
        }

        public override void SetViewportBounds(float left, float bottom, float right, float top)
        {
            Width = right - left;
            Height = top - bottom;

            World.Rotation.SetIdentity();
            World.PositionX = left + Width / 2f;
            World.PositionY = bottom + Height / 2f;
        }

        protected override Matrix GetProjectionMatrix()
        {
            return Matrix.CreateOrthographic(Width, Height, NearPlaneDistance, FarPlaneDistance);
        }
    }
}
